.pdf-watermark-container {
            max-width: 900px;
            margin: 40px auto;
            padding: 0 15px;
        }
        
        .pdf-watermark-header {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .pdf-watermark-header h1 {
            color: #333;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 15px;
        }
        
        .pdf-watermark-header p {
            color: #666;
            font-size: 1.1rem;
        }
        
        .pdf-upload-area {
            border: 3px dashed #e5332d;
            border-radius: 10px;
            padding: 60px 20px;
            text-align: center;
            background-color: #fff;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .pdf-upload-area:hover {
            background-color: #fff5f5;
            border-color: #c72d27;
        }
        
        .pdf-upload-area.dragover {
            background-color: #ffe6e6;
            border-color: #c72d27;
        }
        
        .pdf-upload-icon {
            font-size: 4rem;
            color: #e5332d;
            margin-bottom: 20px;
        }
        
        .pdf-btn-primary {
            background-color: #e5332d;
            border: none;
            padding: 12px 30px;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 5px;
            transition: all 0.3s ease;
        }
        
        .pdf-btn-primary:hover {
            background-color: #c72d27;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(229, 51, 45, 0.3);
        }
        
        .pdf-options-card {
            background: #fff;
            border: 1px solid #e0e0e0;
            border-radius: 10px;
            padding: 25px;
            margin-top: 30px;
            display: none;
        }
        
        .pdf-tab-buttons {
            display: flex;
            gap: 10px;
            margin-bottom: 25px;
        }
        
        .pdf-tab-btn {
            flex: 1;
            padding: 12px 20px;
            background: #f8f9fa;
            border: 2px solid #e0e0e0;
            border-radius: 5px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .pdf-tab-btn.active {
            background: #e5332d;
            color: white;
            border-color: #e5332d;
        }
        
        .pdf-tab-btn:hover:not(.active) {
            background: #e9ecef;
        }
        
        .pdf-tab-content {
            display: none;
        }
        
        .pdf-tab-content.active {
            display: block;
        }
        
        .pdf-form-group {
            margin-bottom: 20px;
        }
        
        .pdf-form-label {
            font-weight: 600;
            color: #333;
            margin-bottom: 8px;
            display: block;
        }
        
        .pdf-form-control {
            width: 100%;
            padding: 10px 15px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
        }
        
        .pdf-form-control:focus {
            outline: none;
            border-color: #e5332d;
            box-shadow: 0 0 0 3px rgba(229, 51, 45, 0.1);
        }
        
        .pdf-color-picker {
            width: 60px;
            height: 40px;
            border: 1px solid #ddd;
            border-radius: 5px;
            cursor: pointer;
        }
        
        .pdf-range-slider {
            width: 100%;
            height: 6px;
            border-radius: 3px;
            background: #e0e0e0;
            outline: none;
            -webkit-appearance: none;
        }
        
        .pdf-range-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #e5332d;
            cursor: pointer;
        }
        
        .pdf-range-slider::-moz-range-thumb {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #e5332d;
            cursor: pointer;
            border: none;
        }
        
        .pdf-position-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
            margin-top: 10px;
        }
        
        .pdf-position-btn {
            padding: 15px;
            border: 2px solid #ddd;
            background: #fff;
            border-radius: 5px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }
        
        .pdf-position-btn:hover {
            border-color: #e5332d;
            background: #fff5f5;
        }
        
        .pdf-position-btn.active {
            border-color: #e5332d;
            background: #e5332d;
            color: white;
        }
        
        .pdf-image-upload {
            border: 2px dashed #ddd;
            border-radius: 5px;
            padding: 30px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .pdf-image-upload:hover {
            border-color: #e5332d;
            background: #fff5f5;
        }
        
        .pdf-preview-image {
            max-width: 200px;
            max-height: 200px;
            margin: 15px auto;
            display: block;
            border-radius: 5px;
        }
        
        .pdf-process-btn {
            background-color: #e5332d;
            color: white;
            border: none;
            padding: 15px 40px;
            font-size: 1.2rem;
            font-weight: 700;
            border-radius: 5px;
            width: 100%;
            margin-top: 30px;
            transition: all 0.3s ease;
        }
        
        .pdf-process-btn:hover:not(:disabled) {
            background-color: #c72d27;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(229, 51, 45, 0.3);
        }
        
        .pdf-process-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }
        
        .pdf-file-list {
            margin-top: 20px;
        }
        
        .pdf-file-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 15px;
            background: #f8f9fa;
            border-radius: 5px;
            margin-bottom: 10px;
        }
        
        .pdf-file-info {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .pdf-file-icon {
            font-size: 2rem;
            color: #e5332d;
        }
        
        .pdf-file-remove {
            background: none;
            border: none;
            color: #dc3545;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 5px;
        }
        
        .pdf-guide-section {
            background: #f8f9fa;
            padding: 40px 20px;
            margin-top: 60px;
        }
        
        .pdf-guide-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .pdf-guide-content h2 {
            color: #333;
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 30px;
            text-align: center;
        }
        
        .pdf-guide-content h3 {
            color: #e5332d;
            font-size: 1.5rem;
            font-weight: 600;
            margin-top: 30px;
            margin-bottom: 15px;
        }
        
        .pdf-guide-content p {
            color: #555;
            font-size: 1.05rem;
            line-height: 1.7;
            margin-bottom: 15px;
        }
        
        .pdf-guide-content ol, .pdf-guide-content ul {
            color: #555;
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 20px;
        }
        
        .pdf-guide-content li {
            margin-bottom: 10px;
        }